:root {
            --primary: #6c5ce7;
            --secondary: #a66efa;
            --dark: #2d3436;
            --light: #f8f9fa;
            --transition: all 0.3s ease;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', system-ui, sans-serif;
        }

        body {
            background: var(--light);
            line-height: 1.7;
            overflow-x: hidden;
        }

        /* 导航栏 */
        .navbar {
            background: rgba(255,255,255,0.95);
            backdrop-filter: blur(10px);
            box-shadow: 0 2px 15px rgba(0,0,0,0.1);
            padding: 1rem 5%;
            position: fixed;
            width: 100%;
            z-index: 1000;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: var(--transition);
        }

        .navbar.scrolled {
            padding: 0.8rem 5%;
        }

        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        /* 作者信息 */
        .author-info {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 5px;
            margin-right: 10px;
        }

        .qq-avatar {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            border: 2px solid var(--primary);
            box-shadow: 0 2px 8px rgba(108,92,231,0.2);
            object-fit: cover;
        }

        .author-name {
            font-size: 0.9rem;
            color: var(--dark);
            font-weight: 500;
            white-space: nowrap;
        }

        /* 首屏区域 */
        .hero {
            padding: 120px 5% 80px;
            min-height: 100vh;
            display: flex;
            align-items: center;
            background: linear-gradient(45deg, #f3f3ff, #f8f7ff);
        }

        .hero-content {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
            opacity: 0;
            transform: translateY(30px);
            animation: fadeUp 1s forwards;
        }

        .hero-image img {
            width: 150%;
            height: auto;
            image-rendering: -webkit-optimize-contrast;
            border-radius: 30px;
            box-shadow: 20px 20px 40px rgba(0,0,0,0.1);
            transform: perspective(1000px) rotateY(-15deg);
            transition: var(--transition);
        }

        /* 功能卡片区域 */
        .features {
            padding: 5rem 10%;
            background: white;
        }

        .feature-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            margin: 0 auto;
            padding: 1rem 0;
        }

        .feature-card {
            padding: 2rem;
            border-radius: 15px;
            background: var(--light);
            transition: var(--transition);
            opacity: 0;
            transform: translateY(20px);
            text-align: center;
            display: flex;
            flex-direction: column;
            align-items: center;
            min-height: 250px;
        }

        .features h2 {
            text-align: center;
            margin-bottom: 3rem;
        }

        .feature-icon {
            font-size: 2.5rem;
            color: var(--primary);
            margin-bottom: 1.5rem;
            transition: var(--transition);
        }

        .feature-card.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* 下载区域 */
        .download {
            padding: 5rem 5%;
            text-align: center;
            background: var(--light);
        }

        .download-btn {
            padding: 1.2rem 2.5rem;
            border-radius: 50px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 0.8rem;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .download-btn::after {
            content: '';
            position: absolute;
            width: 100%;
            height: 100%;
            background: rgba(255,255,255,0.1);
            left: -100%;
            transition: var(--transition);
        }

        .download-btn:hover::after {
            left: 100%;
        }

        /* 页脚 */
        footer {
            background-color: white ;
            margin-top: 4rem;
            font-size: 15;
            font-family: "微软雅黑";
            padding: 2em 5%;
        }

        .copyright {
            text-align: center;
        }

        /* 动画 */
        @keyframes fadeUp {
            to { opacity: 1; transform: translateY(0); }
        }

        /* 响应式设计 */
        @media (max-width: 1200px) {
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero-image img {
                width: 120%;
            }
        }

        @media (max-width: 768px) {
            .navbar {
                padding: 1rem 5%;
            }
            .author-name {
                display: none;
            }
            .qq-avatar {
                width: 35px;
                height: 35px;
                margin-right: 15px;
            }
            .hero-content {
                grid-template-columns: 1fr;
                text-align: center;
            }
            .hero-image img {
                width: 100%;
                transform: none;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .feature-card {
                min-height: auto;
                padding: 1.5rem;
            }
            .download-btn {
                width: 100%;
                justify-content: center;
            }
        }

        @media (max-width: 480px) {
            .feature-icon {
                font-size: 2rem;
            }
            .logo {
                font-size: 1.5rem;
            }
        }
        .core-text {
            position: fixed;
            pointer-events: none;
            font-family: 'Microsoft Yahei', sans-serif;
            font-weight: bold;
            white-space: nowrap;
            animation: float 1.5s ease-out forwards;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
            z-index: 9999;
        }

        @keyframes float {
            0% {
                opacity: 1;
                transform: translate(-50%, -50%) scale(1);
            }
            100% {
                opacity: 0;
                transform: translate(-50%, -200%) scale(1.5);
            }
        }